Futures Mayhem Fiberglass Twinzer+ Surfboard Fins - Large/WhiteThe TWINZER+ fin setup is a modern performance take on the classic Twinzer fin design, but with an added twist. A TWINZER+ rear stabilizer trailing fin adds more punch, more power, and even more control to a typical Twin, Twinzer, or Twin+ trailer. Like other Twinzers, the forward canard fins extend the base, claw into the wave face, and apply more pressure to the bottom of the board. Because of this, a more upright, narrower base, lower area twin is